The new secret to the body you want? We have it: the SandBell

If your will to exercise is getting about as weak as Anastasia Steele’s watery English Breakfast tea, it’s probably a sign that you need to shake up your routine. The good news: We found a fun new way to help you torch calories, blast through plateaus, beat boredom, and shed pounds: SandBells. These soft, sand-filled bags can be curled like dumbbells, tossed like medicine balls, swung like kettlebells, and glided like disks. They’re also bust-proof, which means they can be slammed to the floor, making them a great stress reliever. They’re so cool, in fact, that we asked Brook Benten, the creator of the SandBell Total Body Blast DVD, to create a SandBell workout for the September issue of Prevention magazine. (You can bang it out in less than 20 minutes, and it burns more calories than the average 60-minute walk!) SandBells start at 2 pounds and go all the way up to 50 pounds, so all fitness levels can use them.

Ever since a few Sandbells made their way into our office a few months ago, I’ve been keeping a 10-pounder under my desk. On days I can’t get to the gym, I jot down the following categories on a Post-It: Squats, Torso Twist, Overhead Press, Squat Toss, and Triceps Press. Whenever I get through a set of 10 reps of one move, I make a little hashmark under that category. By the end of the day, I’ve done 3 or 4 sets of each, and have snuck in a mini, totally painless SandBell strength session. (I also make a “water” category, which is a fun way to remind myself to stay hydrated.)